Rightmost Long Division

Logic Level 3

$\LARGE{ \require{enclose} \begin{array}{rll} \phantom{0}\ \boxed{{4}} && \\[-2pt] \boxed{\phantom0}\ \enclose{longdiv}{\boxed{\phantom0} \ \boxed{3}}\kern-.2ex \\[-2pt] \underline{\boxed{\phantom0} \ \boxed{2}} && \\[-2pt] \boxed{1} \end{array} }$

Above shows a long division. Which of the following is a possible value of the sum of all the missing digits?

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